import QtQuick 2.5
import QtQuick.Window 2.2

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Item {
        id: root
        anchors.fill: parent
        property string chirality: "left"

        Rectangle {
            id: rec
            anchors.fill: parent
            color: "red"
        }

        Canvas {
            id: painter
            anchors.fill: parent

            onPaint: {
                var ctx = getContext("2d");
                ctx.reset();
                ctx.lineJoin = "round";

                ctx.lineWidth = 4;
                ctx.strokeStyle = "black";

                var Ax, Ay, Bx, By, Cx, Cy;

                // NOTE: You might have to subtract half the line width.
                if (root.chirality === "left") {
                    Ax = root.width - (ctx.lineWidth / 2);
                    Ay = 0 + (ctx.lineWidth / 2);
                    Bx = Ax;
                    By = root.height - (ctx.lineWidth / 2);
                    Cx = 0 + (ctx.lineWidth / 2);
                    Cy = root.height / 2;
                }
                if (root.chirality === "right") {

                }

                ctx.beginPath();
                ctx.moveTo(Ax, Ay);
                ctx.lineTo(Bx, By);
                ctx.lineTo(Cx, Cy);
                ctx.lineTo(Ax, Ay);
                ctx.stroke();
                ctx.closePath();
            }
        }



        Timer{
            interval: 5000
            running: true
            repeat: NumberAnimation.Infinite
            onTriggered: {
                console.log("Paint ! ")
                painter.paint(rec)
            }
        }
    }
}